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usb: dwc3-meson-g12a: add power-on/off of the PHYs

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Power on/off the PHYs to enable power to the USB ports, fixing USB support
on Khadas VIM3/VIM3L boards.

The G12A USB complex has at least 2 USB2 PHYs, but one is muxed between the
DWC2 and DWC3 controller and the other one directly connected to the DWC3
controller. The USB3+PCIe combo PHY is muxed between the DWC3 controller
and a DW-PCIE controller.
All PHYs are optional, but it's type (usb2/usb3) and position are important
to determine it's capabilities, thus they are stored in a fixed size
array and the phy-name determines it's position, it's position determining
it's type and functionnalities.
This is why we need to loop over the array to power on all the DT provided
PHYs.

Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
Reviewed-by: Marek Vasut <marex@denx.de>
This commit is contained in:
Neil Armstrong 2020-04-21 10:17:42 +02:00
parent 93d529a275
commit 3dc4f83970
1 changed files with 16 additions and 0 deletions
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16
drivers/usb/dwc3/dwc3-meson-g12a.c
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@ -408,6 +408,15 @@ static int dwc3_meson_g12a_probe(struct udevice *dev)
goto err_phy_init;
}
for (i = 0; i < PHY_COUNT; ++i) {
if (!priv->phys[i].dev)
continue;
ret = generic_phy_power_on(&priv->phys[i]);
if (ret)
goto err_phy_init;
}
return 0;
err_phy_init:
@ -430,6 +439,13 @@ static int dwc3_meson_g12a_remove(struct udevice *dev)
clk_release_all(&priv->clk, 1);
for (i = 0; i < PHY_COUNT; ++i) {
if (!priv->phys[i].dev)
continue;
generic_phy_power_off(&priv->phys[i]);
}
for (i = 0 ; i < PHY_COUNT ; ++i) {
if (!priv->phys[i].dev)
continue;